{"product_id":"carrier-hb1ajx030000aaaa-contactor-1iwybu","title":"OEM Carrier Contactor 24V 2-Pole for HB1AJX030000AAAA — HN51KB024","description":"\u003ch1\u003eOEM Carrier 2-Pole Contactor 24V Coil for Model HB1AJX030000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement contactor (part number \u003cstrong\u003eHN51KB024\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HB1AJX030000AAAA\u003c\/strong\u003e air conditioning system. The contactor is the high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to send line voltage to the compressor and condenser fan motor. When the contactor fails — through burned or pitted contacts, a stuck plunger, or a failed coil — the system will fail to energize entirely, leaving you with a unit that hums, clicks repeatedly, or does nothing at all when cooling is called for.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 2-pole configuration | 24V AC coil voltage | Rated for single-phase compressor and fan motor loads | OEM part number HN51KB024 | Factory-matched contact material and coil resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM contactors use factory-spec silver-alloy contact surfaces that resist pitting and arcing far longer than generic alternatives. A mismatched coil resistance can cause chatter, overheating, or nuisance tripping — OEM eliminates that risk entirely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify with a non-contact voltage tester before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. One screw terminal at a time — never work live on high-voltage terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier HB1AJX030000AAAA\u003c\/strong\u003e system. Always cross-reference the OEM part number \u003cstrong\u003eHN51KB024\u003c\/strong\u003e and verify coil voltage and pole configuration on your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. \u003cstrong\u003eIn stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909351625075,"sku":"CARRIE-HB1AJX030000AAAA-CONTACTOR-HN51KB024","price":31.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909351657843,"sku":"CARRIE-HB1AJX030000AAAA-CONTACTOR-HN51KB024-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-contactor-2pole-HN51KB024_92ec2a35-3b1a-4f5f-8fc1-7331e4fe8809.jpg?v=1782905237","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hb1ajx030000aaaa-contactor-1iwybu","provider":"National HVAC Parts","version":"1.0","type":"link"}